Method, system and device for determining clearance value of tower and wind turbine generator

Abstract

The invention discloses a tower clearance value determining method, system and device and a wind turbine generator, and relates to the technical field of wind power generation. According to the embodiment of the invention, the third distance from the distance measuring device to the edge of the tower is determined by using the first distance from the blade tip of the blade in the wind turbine generator to the running track projection plane of the distance measuring device, the second distance from the distance measuring device to the axis of the tower, the edge parameter of the tower corresponding to the blade tip and the azimuth angle of the distance measuring device; and then the tower clearance value of the wind turbine generator is determined based on the third distance and the first distance, calculation of the square tower clearance value is achieved, the influence of different edges of the square structure on the tower clearance value is considered, and the accuracy of the tower clearance value is improved.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and particularly to a method, system, device and wind turbine for determining the tower clearance value. Background Art

[0002] Tower clearance refers to the straight-line distance from the tip of the wind turbine blade to the edge of the tower when the blade is perpendicular to the horizontal plane. With the development of wind power generation technology, the blades of wind turbines are getting longer and their stiffness is getting smaller, resulting in increased blade deformation. During the operation of the wind turbine, the blade is prone to collide with the tower, causing the blade and / or the tower to break. To avoid collision accidents, it is necessary to determine the tower clearance value in real time.

[0003] The currently adopted scheme for determining the tower clearance value is only applicable to circular tower barrels and has low accuracy for square tower barrels. Summary of the Invention

[0004] Embodiments of the present application provide a method, system, device and wind turbine for determining the tower clearance value, which can accurately determine the tower clearance value when the cross-section of the tower is a square structure.

[0005] In a first aspect, embodiments of the present application provide a method for determining the tower clearance value. The method is applied to a wind turbine, which includes a tower, a nacelle, blades and a distance measuring device. The nacelle is arranged on the top of the tower, and the distance measuring device is arranged on the nacelle and used to measure the first distance from the tip of the blade to the running track projection plane of the distance measuring device. The method includes:

[0006] Obtain the second distance from the distance measuring device to the axis of the tower, the edge parameters of the tower corresponding to the blade tip, the azimuth angle of the distance measuring device, and the first distance. The cross-section of the tower corresponding to the blade tip is a square structure;

[0007] Determine the third distance from the distance measuring device to the edge of the tower according to the second distance, the edge parameters and the azimuth angle of the distance measuring device;

[0008] Determine the tower clearance value of the wind turbine according to the third distance and the first distance.

[0009] In a second aspect, embodiments of the present application provide a system for determining the tower clearance value, including:

[0010] A distance measuring device, arranged on the nacelle of the wind turbine, for measuring the first distance from the tip of the blade in the wind turbine to the running track projection plane of the distance measuring device;

[0011] A nacelle azimuth angle sensor, arranged inside the nacelle of the wind turbine, for measuring the azimuth angle of the distance measuring device;

[0012] A collecting device, configured to collect a first distance, an azimuth angle, a second distance from a distance measuring device to an axis of a tower of a wind turbine, and edge parameters of the tower corresponding to a blade tip;

[0013] A control device, configured to determine a third distance from the distance measuring device to an edge of the tower according to the second distance, the edge parameters, and the azimuth angle of the distance measuring device; and determine a tower clearance value of the wind turbine according to the third distance and the first distance.

[0014] In a third aspect, an embodiment of the present application provides a device for determining a tower clearance value, including:

[0015] A processor,

[0016] A memory, configured to store computer program instructions;

[0017] When the computer program instructions are executed by the processor, the method for determining a tower clearance value as described in the first aspect is implemented.

[0018] In a fourth aspect, an embodiment of the present application provides a wind turbine, including the system for determining a tower clearance value as described in the second aspect or the device for determining a tower clearance value as described in the third aspect.

[0019] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, on which computer program instructions are stored, and when the computer program instructions are executed by a processor, the method for determining a tower clearance value as described in the first aspect is implemented.

[0020] In the embodiment of the present application, the first distance from the blade tip of the wind turbine to the running trajectory projection plane of the distance measuring device, the second distance from the distance measuring device to the tower axis, the edge parameters of the tower corresponding to the blade tip, and the azimuth angle of the distance measuring device are used to determine the third distance from the distance measuring device to the edge of the tower, and then the tower clearance value of the wind turbine is determined based on the third distance and the first distance, realizing the calculation of the tower clearance value of a square tower, considering the influence of different edges of the square structure on the tower clearance value, and improving the accuracy of the tower clearance value. Description of the Drawings

[0021] The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the drawings.

[0022] Figure 1 A flowchart of a method for determining a tower clearance value provided by an embodiment of the present application;

[0023] Figure 2 A side view of a wind turbine provided by an embodiment of the present application;

[0024] Figure 3A top view of a wind turbine provided by an embodiment of the present application;

[0025] Figure 4 Another top view of a wind turbine provided by an embodiment of the present application;

[0026] Figure 5 A display schematic diagram of the division result of a tower cross-section provided by an embodiment of the present application;

[0027] Figure 6 A flowchart of another method for determining the tower clearance value provided by an embodiment of the present application;

[0028] Figure 7 A structural diagram of a system for determining the tower clearance value provided by an embodiment of the present application;

[0029] Figure 8 A structural diagram of a device for determining the tower clearance value provided by an embodiment of the present application;

[0030] Figure 9 A structural diagram of another device for determining the tower clearance value provided by an embodiment of the present application. Detailed Description of the Invention

[0031] With the development of wind power generation technology, the blades of wind turbines are getting longer and their stiffness is getting smaller, resulting in increased blade deformation. During the operation of wind turbines, the blades are prone to collide with the tower, causing the blades and / or the tower to break. To avoid collision accidents, it is necessary to determine the tower clearance value in real time.

[0032] The currently adopted scheme for determining the tower clearance value is only applicable to towers with a cylindrical structure, and the accuracy is relatively low for square tower barrels.

[0033] Therefore, the embodiments of the present application provide a method, a system, a device and a wind turbine for determining the tower clearance value, which can accurately determine the tower clearance value when the tower cross-section is a square structure.

[0034] The method, system and device for determining the tower clearance value provided by the embodiments of the present application will be described in detail below through specific embodiments.

[0035] Figure 1 A flowchart of a method for determining the tower clearance value provided by an embodiment of the present application, which can be applied to Figure 2The wind turbine unit 200 shown, the wind turbine unit 200 may include a tower 201, a nacelle 202, blades 203 and a distance measuring device 204. The nacelle 202 is arranged at the top of the tower 201. The distance measuring device 204 may be arranged at a position near the impeller at the bottom of the nacelle 202. The distance measuring device 204 is used to measure the first distance L from the tip of the blade 203 to the projection plane of the running track of the distance measuring device 204. As Figure 2 shown, the first distance L is the distance between the tip and the projection plane S.

[0036] Exemplarily, as Figure 2 shown, the tower 201 may be a lattice tower, that is, the cross-section of the tower 201 corresponding to the tip is a square structure tower. The square here may be a square.

[0037] The distance measuring device 204 may be a device capable of measuring the first distance from the tip of the blade to the projection plane S of the running track of the distance measuring device 204. For example, the distance measuring device 204 may be a microwave radar, an image acquisition device with data processing function, etc.

[0038] Exemplarily, the projection plane S of the running track of the distance measuring device 204 may be a plane formed by the axis of the distance measuring device 204, and the axis of the distance measuring device 204 is parallel to the axis of the tower 201.

[0039] As Figure 1 shown, the method for determining the tower clearance value may include the following steps:

[0040] S110. Obtain the second distance R from the distance measuring device 204 to the axis of the tower 201, the edge parameter B of the tower 201 corresponding to the tip, the azimuth angle α' of the distance measuring device 204, and the first distance L.

[0041] S120. Determine the third distance R3 from the distance measuring device 204 to the edge of the tower 201 according to the second distance R, the edge parameter B and the azimuth angle α' of the distance measuring device 204.

[0042] S130. Determine the tower clearance value of the wind turbine unit 200 according to the third distance R3 and the first distance L.

[0043] In the embodiment of the present application, the first distance from the tip of the blade 203 in the wind turbine 200 to the running track projection plane of the distance measuring device 204, the second distance from the distance measuring device 204 to the axis of the tower 201, the edge parameter of the tower 201 corresponding to the tip, and the azimuth angle of the distance measuring device 204 are used to determine the third distance from the distance measuring device 204 to the edge of the tower 201. Then, based on the third distance and the first distance, the tower clearance value of the wind turbine 200 is determined, realizing the calculation of the tower clearance value of the square tower, considering the influence of different edges of the square structure on the tower clearance value, and improving the accuracy of the calculation of the tower clearance value.

[0044] The above steps will be described in detail as follows:

[0045] In S110, the second distance R is the distance from the distance measuring device 204 to the axis of the tower 201. Exemplarily, the wind turbine 200 can be projected onto the horizontal plane to obtain Figure 3 the schematic diagram shown, that is, the top view of the wind turbine 200. In the top view, the second distance R can be the distance between the distance measuring device 204 and the center O point of the tower 201.

[0046] After the wind turbine 200 is installed, the positions of the distance measuring device 204 and the tower 201 are fixed, and the value of the second distance R is also determined accordingly. Exemplarily, the second distance R can be obtained by measurement.

[0047] The edge parameter of the tower 201 corresponding to the tip can include the side length B of the tower 201 corresponding to the tip. In practical applications, the edge parameters corresponding to different positions of the tower can be different. For example, from bottom to top, the side lengths of the tower gradually decrease.

[0048] As Figure 3 shown, the azimuth angle α' of the distance measuring device 204 is the yaw angle of the nose of the wind turbine 200, that is, the angle between the nose and the 0° position.

[0049] Exemplarily, the 0° position can be the position where the nose of the wind turbine 200 coincides with the edge of the tower 201, or the initial position where the nose of the wind turbine 200 is located. Of course, other positions can also be defined as the 0° position according to actual needs, which is not limited in the embodiment of the present application.

[0050] Exemplarily, the azimuth angle α' of the distance measuring device 204 can be measured by a nacelle yaw azimuth angle sensor arranged in the nacelle 202.

[0051] In S120, the third distance R3 is the minimum distance from the distance measuring device 204 to the edge of the tower 201 at a specific azimuth angle α'.

[0052] Exemplarily, the third distance R3 can be calculated based on the second distance R, the side length B of the tower 201, and the azimuth angle α' of the distance measuring device 204.

[0053] As the nose yaws, the azimuth angle α' of the distance measuring device 204 continuously changes. Since the cross-section of the tower 201 at the tip position is a square structure, therefore, at different azimuth angles α', the minimum distance from the distance measuring device 204 to the edge of the tower 201, that is, the third distance R3 also continuously changes. Through the second distance R, the side length B of the tower 201, and the azimuth angle α' of the distance measuring device 204, the minimum distance from the distance measuring device 204 to the edge of the tower 201 at different azimuth angles α' can be calculated in real time, improving the accuracy of the third distance R3.

[0054] For the specific determination process of the third distance R3, reference can be made to the following embodiments.

[0055] In S130, according to the third distance (R3) and the first distance (L), the tower clearance value of the wind turbine 200 can be determined.

[0056] In the embodiment of the present application, when calculating the third distance R3, the influence of the square structure of the tower at the tip position on the third distance R3 is fully considered, that is, when the nose runs to different edges of the tower, the third distance R3 is different, thereby improving the accuracy of the third distance R3. Thus, when calculating the tower clearance value based on the third distance R3 and the first distance L, the accuracy of the tower clearance value can be improved.

[0057] Considering the actual application, the running trajectory of the distance measuring device 204 may be located outside the edge of the tower 201, as Figure 3 shown; or may be located inside the edge of the tower 201, as Figure 4 shown.

[0058] When the relationship between the running trajectory of the distance measuring device 204 and the edge of the tower 201 is different, different strategies are adopted when calculating the tower clearance value.

[0059] Exemplarily, when the running trajectory of the distance measuring device 204 is located inside the edge of the tower 201, the sum of the third distance R3 and the first distance L is determined as the tower clearance value of the wind turbine 200. When the running trajectory of the distance measuring device 204 is located outside the edge of the tower 201, the difference between the first distance L and the third distance R3 is determined as the tower clearance value of the wind turbine 200.

[0060] That is, when the relationship between the running trajectory of the distance measuring device 204 and the edge of the tower 201 is as Figure 3 shown, the tower clearance value TC = R3 + L. When the relationship between the running trajectory of the distance measuring device 204 and the edge of the tower 201 is asFigure 4 When shown as such, the tower clearance value TC = L - R3. Among them, 2010 is the column of the tower 201, and the tower 201 with a square structure includes four columns 2010.

[0061] In the embodiment of the present application, with the help of the distance measuring device 204 and the nacelle azimuth sensor, when the cross-section of the tower at the blade tip position is a square structure, the influence of different edges of the tower and the relationship between the running trajectory of the distance measuring device 204 and the edges of the tower 201 on the tower clearance value are fully considered, improving the accuracy of the tower clearance value.

[0062] It can be understood that different tower clearance values are determined with different azimuth angles α' of the distance measuring device 204. To accurately determine the distances from the blade tip to different edges of the tower 201, exemplarily, the cross-section of the tower 201 can be divided into multiple partitions, and for different partitions, corresponding tower clearance determination methods are adopted.

[0063] Based on this, in some embodiments, before S120, the following method can also be used for partition processing:

[0064] Divide the cross-section of the tower 201 according to the initial position of the head of the wind turbine 200 to obtain at least one partition;

[0065] Based on the partition result, determine the partition where the azimuth angle α' of the distance measuring device 204 is located.

[0066] One of the purposes of the partition processing is to facilitate the implementation of the tower clearance value determination method on the computer side.

[0067] The initial position of the head can be the position where the head of the wind turbine 200 is located when it starts, or the position where the head coincides with the edge of the tower 201. Exemplarily, the initial position of the head can be used as the 0° position to divide the cross-section of the tower 201 to obtain at least one partition.

[0068] The division method of each partition is related to the square shape of the cross-section of the tower 201. For example, when the cross-section of the tower 201 is square, as Figure 5 shown, the cross-section of the tower 201 can be divided into 8 partitions, namely partition 1, partition 2,..., partition 8. Among them, the angle range of partition 1 is 0° to 45°, the angle range of partition 2 is 45° to 90°, the angle range of partition 3 is 90° to 135°, the angle range of partition 4 is 135° to 180°, the angle range of partition 5 is 180° to 225°, the angle range of partition 6 is 225° to 270°, the angle range of partition 7 is 270° to 315°, and the angle range of partition 8 is 315° to 360°.

[0069] Exemplarily, when the cross-section of the tower 201 is circular, the cross-section of the tower 201 can be divided into one partition.

[0070] According to the azimuth angle α' of the distance measuring device 204, the partition where the distance measuring device 204 is located can be determined. Taking Figure 6 the partition shown as an example, exemplarily, when 0° < α' < 45°, it can be determined that the azimuth angle α' of the distance measuring device 204 is located in partition 1, and the judgment process for other partitions is similar. Therefore, during the yaw of the nacelle, the partition where the azimuth angle α' of the distance measuring device 204 is located can be determined in real time, providing a data basis for determining the third distance R3 subsequently.

[0071] By dividing the cross-section of the tower 201, the partition where the azimuth angle α' is located can be determined, so that the tower clearance value can be calculated subsequently based on the tower clearance value calculation method corresponding to this partition, realizing the accurate measurement from the blade tip to the square structure tower 201 and improving the accuracy of the tower clearance value.

[0072] In some embodiments, as Figure 6 shown, the method for determining the tower clearance value may include the following steps:

[0073] S610. Obtain the second distance from the distance measuring device 204 to the axis of the tower 201, the edge parameter of the tower 201 corresponding to the blade tip, the azimuth angle of the distance measuring device 204, and the first distance.

[0074] S620. Determine the first angle α according to the partition where the azimuth angle α' of the distance measuring device 204 is located and the azimuth angle α'.

[0075] S630. Determine the fourth distance R1 from the center of the tower 201 to the edge of the tower 201 on the first connecting line between the distance measuring device 204 and the center of the tower 201 according to the first angle α and the edge parameter B.

[0076] S640. Determine the third distance R3 from the distance measuring device 204 to the edge of the tower 201 on the first connecting line according to the fourth distance R1, the second distance R, and the first angle α.

[0077] S650. Determine the tower clearance value of the wind turbine 200 according to the third distance R3 and the first distance L.

[0078] Among them, the processes of S610 and S650 can refer to the above embodiments. For the sake of brief description, they will not be elaborated here.

[0079] The following elaborates on the above other steps in detail, as specifically shown below:

[0080] In S620, the partitioning method can refer to the above embodiments. For the sake of concise description, it will not be elaborated here. The first angle α is used to determine the third distance R3 from the distance measuring device 204 to the edge of the tower 201. Exemplarily, in the top view of the wind turbine 200, the first angle α can be the angle between the first connection line between the distance measuring device 204 and the center O point of the tower 201 and the straight line corresponding to the minimum distance from the distance measuring device 204 to the edge of the tower 201.

[0081] There is an association relationship between the azimuth angle α' and the first angle α, and this association relationship is related to the partition where the azimuth angle α' is located. Therefore, based on the partition where the azimuth angle α' is located and the azimuth angle α', the first angle α can be determined, providing a data basis for determining the third distance R3 subsequently.

[0082] Exemplarily, when the azimuth angle α' of the distance measuring device 204 is located in the first partition, the azimuth angle α' is determined as the first angle α; when the azimuth angle α' of the distance measuring device 204 is located in the second partition, the difference between the upper limit angle of the second partition and the azimuth angle α' is determined as the first angle α; when the azimuth angle α' of the distance measuring device 204 is located in the third partition, the difference between the azimuth angle α' and the lower limit angle of the third partition is determined as the first angle α; where the first partition, the second partition, and the third partition are at least one of each partition.

[0083] Taking Figure 5 the shown partitioning method as an example, exemplarily, the first partition may include Figure 5 partition 1 in, that is, the area between 0° and 45° in the cross-section of the tower 201. When the azimuth angle α' is located in the first partition, the first angle α is the same as the azimuth angle α', that is, α = α'.

[0084] Exemplarily, the second partition may include four sub-partitions, and each sub-partition is centrosymmetric about the center point O of the cross-section of the tower 201. For example, the second partition may include Figure 5 partition 2, partition 4, partition 6, and partition 8 in. Partition 2, partition 4, partition 6, and partition 8 are centrosymmetric about the center point O.

[0085] Exemplarily, when the azimuth angle α' is located in partition 2, partition 4, partition 6, or partition 8, the first angle α = the upper limit angle of the corresponding partition - the azimuth angle α'.

[0086] Taking the azimuth angle α' located in partition 2 as an example, then α = 90° - α'. Similarly, when the azimuth angle α' is located in partition 4, α = 180° - α'; when the azimuth angle α' is located in partition 6, α = 270° - α'; when α' is located in partition 8, α = 360° - α'.

[0087] Exemplarily, the third partition may include three sub - partitions, wherein the first partition and the first sub - partition of the third partition are centrosymmetric about the section center point O, and the second sub - partition of the third partition and the third sub - partition of the third partition are centrosymmetric about the section center point O.

[0088] Exemplarily, the third partition may include Figure 5 partition 3, partition 5, and partition 7 in [reference], wherein partition 3 and partition 7 are the second sub - partition and the third sub - partition respectively, and partition 5 is the first sub - partition.

[0089] Exemplarily, when the azimuth angle α’ is located in partition 3, partition 5, or partition 7, α = α’ - the lower limit angle of the corresponding partition.

[0090] Taking the azimuth angle α’ located in partition 3 as an example, then α = α’ - 90°. Similarly, when the azimuth angle α’ is located in partition 5, α = α’ - 180°; when the azimuth angle α’ is located in partition 7, α = α’ - 270°.

[0091] Exemplarily, the relationship between α and α’ is as follows:

[0092] When 0° < α’ < 45°, α = α’;

[0093] When 45° < α’ < 90°, α = 90° - α’;

[0094] When 90° < α’ < 135°, α = α’ - 90°;

[0095] When 135° < α’ < 180°, α = 180° - α’;

[0096] When 180° < α’ < 225°, α = α’ - 180°;

[0097] When 225° < α’ < 270°, α = 270° - α’;

[0098] When 270° < α’ < 315°, α = α’ - 270°;

[0099] When 315° < α’ < 360°, α = 360° - α’.

[0100] In the embodiment of the present application, the section of the tower 201 is divided into multiple partitions. According to the partition where the azimuth angle α’ is located and the azimuth angle α’, the first angle α can be accurately determined, and further the accuracy of the third distance R3 can be improved. Thus, when determining the tower clearance value based on the third distance R3, the accuracy of the tower clearance value can be improved.

[0101] In S630, the fourth distance R1 is: on the first connection line between the distance measuring device 204 and the center O of the tower 201, the distance from the center O of the tower 201 to the edge of the tower 201.

[0102] Exemplarily, referring to Figure 3 or Figure 4 , according to the first angle α and the edge parameter B, the fourth distance R1 can be determined. For example, R1 = B / 2÷cosα.

[0103] In S640, according to the fourth distance R1, the second distance R, and the first angle α, combined with the trigonometric function relationship, the minimum distance from the distance measuring device 204 to the edge of the tower 201 on the first connection line can be determined, that is, the third distance R3.

[0104] In the embodiment of the present application, the cross-section of the tower 201 is divided into multiple partitions. For different partitions, based on the first angle α and the edge parameter B, on the first connection line between the distance measuring device 204 and the center O of the tower 201, the fourth distance R1 from the center O of the tower 201 to the edge of the tower 201 can be determined. Furthermore, based on the fourth distance R1, the second distance R, and the first angle α, the third distance R3 corresponding to this partition can be determined, improving the accuracy of the third distance R3.

[0105] In some embodiments, the above S640 may include the following steps:

[0106] Calculate the deviation R2 between the second distance R and the fourth distance R1 and the cosine value cosα of the first angle;

[0107] Based on the deviation R2 and the cosine value cosα, determine the third distance R3.

[0108] Exemplarily, R2 = R - R1.

[0109] It should be noted that when the running trajectory of the distance measuring device 204 and the edge of the tower 201 satisfy Figure 3 the relationship shown, R > R1, that is, at this time R2 > 0. When the running trajectory of the distance measuring device 204 and the edge of the tower 201 satisfy Figure 4 the relationship shown, R < R1, that is, at this time R2 < 0.

[0110] Based on the product value of the deviation R2 and the cosine value cosα, the third distance R3 can be determined. Exemplarily, R3 = |R2*cosα|. Specifically, when R2 > 0, R3 = R2*cosα, and when R2 < 0, R3 = -R2*cosα.

[0111] In the embodiments of the present application, for different partitions, in combination with the relationship between the running trajectory of the distance measuring device 204 and the edge of the tower 201, the third distance R3 is determined, improving the accuracy of the third distance R3.

[0112] In some embodiments, after S130, the method for determining the tower clearance value may further include the following steps: when the tower clearance value is greater than a preset threshold, generate a clearance value abnormal alarm message and output it.

[0113] Exemplarily, when the tower clearance value is greater than a preset threshold, a clearance value abnormal alarm message may be generated and output. The embodiments of the present application do not limit the size of the preset threshold, the form of the clearance value abnormal alarm message, or the output form.

[0114] For example, the clearance value abnormal alarm message may include, but is not limited to, information such as the number of the wind turbine generator, the size of the current clearance value, and the size exceeding the preset threshold. Thus, when the operation and maintenance personnel receive the clearance value abnormal alarm message, they can quickly adopt appropriate maintenance strategies for the relevant wind turbine generator.

[0115] Exemplarily, the clearance value abnormal alarm message may be output in one or more forms such as text message, email, phone call, buzzer, indicator light, etc.

[0116] When it is detected that the tower clearance value is greater than the preset threshold, generating a clearance value abnormal alarm message and outputting it enables the operation and maintenance personnel to take timely intervention, reducing the impact on the wind turbine generator and ensuring the safe operation of the wind turbine generator.

[0117] In the embodiments of the present application, for the lattice tower with a square structure, the cross-section of the lattice tower is divided into multiple partitions. For different partitions, different calculation methods are used to calculate the tower clearance value, improving the accurate calculation of the tower clearance value of the lattice tower, facilitating the timely discovery of blade abnormalities, and reducing the impact on the wind turbine generator.

[0118] Based on the same inventive concept, the embodiments of the present application also provide a system for determining the tower clearance value, as Figure 7 shown. The system for determining the tower clearance value may include:

[0119] A distance measuring device 701, arranged on the nacelle of the wind turbine generator, for measuring the first distance from the tip of the blade in the wind turbine generator to the projection plane of the running trajectory of the distance measuring device;

[0120] A nacelle azimuth angle sensor 702, arranged inside the nacelle of the wind turbine generator, for measuring the azimuth angle of the distance measuring device;

[0121] An acquisition device 703, for acquiring the first distance, azimuth angle, second distance from the distance measuring device to the axis of the tower of the wind turbine generator, and the edge parameters of the tower corresponding to the blade tip;

[0122] A control device 704, configured to determine a third distance from the distance measuring device to the edge of the tower according to the second distance, the edge parameter, and the azimuth angle of the distance measuring device; and determine the tower clearance value of the wind turbine according to the third distance and the first distance.

[0123] For the specific calculation process of the tower clearance value, reference may be made to the above embodiments. For the sake of brevity, it will not be elaborated here.

[0124] In the embodiment of the present application, the first distance from the tip of the blade in the wind turbine to the running track projection plane of the distance measuring device, the second distance from the distance measuring device to the axis of the tower, the edge parameter of the tower corresponding to the tip of the blade, and the azimuth angle of the distance measuring device are used to determine the third distance from the distance measuring device to the edge of the tower. Then, based on the third distance and the first distance, the tower clearance value of the wind turbine is determined, realizing the calculation of the tower clearance value of the square tower, considering the influence of different edges of the square structure on the tower clearance value, and improving the accuracy of the tower clearance value.

[0125] Based on the same inventive concept, the embodiment of the present application further provides a device for determining the tower clearance value, as Figure 8 shown. The device for determining the tower clearance value may include: an acquisition module 801 and a determination module 802;

[0126] The acquisition module 801 is configured to acquire the second distance from the distance measuring device to the axis of the tower, the edge parameter of the tower corresponding to the tip of the blade, the azimuth angle of the distance measuring device, and the first distance. The cross-section of the tower corresponding to the tip of the blade is a square structure;

[0127] The determination module 802 is configured to determine the third distance from the distance measuring device to the edge of the tower according to the second distance, the edge parameter, and the azimuth angle of the distance measuring device;

[0128] The determination module 802 is further configured to determine the tower clearance value of the wind turbine according to the third distance and the first distance.

[0129] In the embodiment of the present application, the first distance from the tip of the blade in the wind turbine to the running track projection plane of the distance measuring device, the second distance from the distance measuring device to the axis of the tower, the edge parameter of the tower corresponding to the tip of the blade, and the azimuth angle of the distance measuring device are used to determine the third distance from the distance measuring device to the edge of the tower. Then, based on the third distance and the first distance, the tower clearance value of the wind turbine is determined, realizing the calculation of the tower clearance value of the square tower, considering the influence of different edges of the square structure on the tower clearance value, and improving the accuracy of the tower clearance value.

[0130] In some embodiments, the device for determining the tower clearance value may further include:

[0131] A dividing module, configured to divide a cross-section of a tower according to an initial position of a nacelle of a wind turbine to obtain at least one partition;

[0132] A determining module 802, further configured to determine a partition where an azimuth angle of a distance measuring device is located based on a partition result.

[0133] In some embodiments, the determining module 802 is specifically configured to:

[0134] Determine a first angle according to the partition where the azimuth angle of the distance measuring device is located and the azimuth angle, where the first angle is used to determine a third distance from the distance measuring device to an edge of the tower, and the partition is obtained by dividing the cross-section of the tower according to the initial position of the nacelle of the wind turbine;

[0135] Determine a fourth distance from the center of the tower to the edge of the tower on a first connection line between the distance measuring device and the center of the tower according to the first angle and an edge parameter;

[0136] Determine a third distance from the distance measuring device to the edge of the tower on the first connection line according to the fourth distance, a second distance, and the first angle.

[0137] In some embodiments, the determining module 802 is specifically configured to:

[0138] When the azimuth angle of the distance measuring device is located in a first partition, determine the azimuth angle as the first angle;

[0139] When the azimuth angle of the distance measuring device is located in a second partition, determine a difference between an upper limit angle of the second partition and the azimuth angle as the first angle;

[0140] When the azimuth angle of the distance measuring device is located in a third partition, determine a difference between the azimuth angle and a lower limit angle of the third partition as the first angle;

[0141] Wherein, the first partition, the second partition, and the third partition are respectively at least one of the partitions.

[0142] In some embodiments, the partition includes a first partition, a second partition, and a third partition, the second partition includes four sub-partitions, and the third partition includes three sub-partitions;

[0143] Each sub-partition of the second partition is centrosymmetric about the center point of the cross-section of the tower, the first partition and the first sub-partition of the third partition are centrosymmetric about the center point of the cross-section, and the second sub-partition and the third sub-partition of the third partition are centrosymmetric about the center point of the cross-section.

[0144] In some embodiments, the determining module 802 is specifically configured to:

[0145] Calculate a deviation between the second distance and the fourth distance and a cosine value of the first angle;

[0146] Determine a third distance based on the deviation and the cosine value.

[0147] In some embodiments, the determining module 802 is specifically configured to:

[0148] When the running trajectory of the distance measuring device is inside the edge of the tower, determine the sum of the third distance and the first distance as the tower clearance value of the wind turbine;

[0149] When the running trajectory of the distance measuring device is outside the edge of the tower, determine the difference between the first distance and the third distance as the tower clearance value of the wind turbine.

[0150] In some embodiments, the device for determining the tower clearance value may further include:

[0151] A generating module, configured to generate and output a clearance value abnormal warning message when the tower clearance value is greater than a preset threshold after the determining module 802 determines the tower clearance value of the wind turbine according to the third distance and the first distance.

[0152] Based on the same inventive concept, an embodiment of the present application further provides a device for determining a tower clearance value. The device for determining the tower clearance value may be, for example, a tablet computer, a notebook computer, a palm computer, etc. The following Figure 9 Details of the device for determining the tower clearance value provided in the embodiment of the present application will be described in detail.

[0153] Such as Figure 9 As shown, the device for determining the tower clearance value may include a processor 901 and a memory 902 for storing computer program instructions.

[0154] The processor 901 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0155] The memory 902 may include a mass memory for data or instructions. By way of example and not limitation, the memory 902 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. In one example, the memory 142 may include removable or non-removable (or fixed) media, or the memory 902 is a non-volatile solid-state memory. In one example, the memory 902 may be a read only memory (ROM). In one example, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.

[0156] The processor 901 reads and executes the computer program instructions stored in the memory 902 to implement Figures 1 - 6 the method in the illustrated embodiment and achieve Figures 1 - 6 the corresponding technical effects achieved by the illustrated embodiment in executing its method. For the sake of concise description, details are not repeated herein.

[0157] In one example, the apparatus for determining the tower clearance value may further include a communication interface 903 and a bus 904. As shown Figure 9 in the figure, the processor 901, the memory 902, and the communication interface 903 are connected via the bus 904 and complete communication with each other.

[0158] The communication interface 903 is mainly used to implement communication between the various modules, apparatuses, and / or devices in the embodiments of the present application.

[0159] Bus 904 includes hardware, software, or both, and couples the components of the tower clearance value determination device to each other. By way of example and not limitation, bus 904 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable bus or a combination of two or more of these. Where appropriate, bus 904 may include one or more buses. Although the embodiments of the present application describe and illustrate specific buses, the present application contemplates any suitable bus or interconnect.

[0160] After obtaining the second distance from the distance measuring device to the axis of the tower, the edge parameter of the tower corresponding to the blade tip, the azimuth angle of the distance measuring device, and the first distance, the tower clearance value determination device can execute the tower clearance value determination method in the embodiments of the present application, so as to achieve the combination Figures 1 - 6 of the described tower clearance value determination method and Figure 8 the described tower clearance value determination device.

[0161] In addition, in combination with the tower clearance value determination method in the above embodiments, the embodiments of the present application can be implemented by providing a computer storage medium. Computer program instructions are stored on the computer storage medium; when the computer program instructions are executed by a processor, any one of the tower clearance value determination methods in the above embodiments is implemented.

[0162] Based on the same inventive concept, the embodiments of the present application also provide a wind turbine, which may include the tower clearance value determination system or the tower clearance value determination device in the above embodiments.

[0163] It should be clear that the present application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications, and additions, or change the order between steps after understanding the spirit of the present application.

[0164] The functional blocks shown in the above block diagrams can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a functional card, and so on. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium or transmitted via a data signal carried in a carrier wave on a transmission medium or a communication link. A "machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, and so on. The code segment can be downloaded via a computer network such as the Internet, an intranet, and so on.

[0165] It should also be noted that the exemplary embodiments mentioned in the present application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above steps, that is, the steps can be executed in the order mentioned in the embodiments, can be different from the order in the embodiments, or several steps can be executed simultaneously.

[0166] Aspects of the embodiments of the present application have been described above with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each block in the flowchart and / or block diagram, and the combination of blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the functions / actions specified in one or more blocks of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It should also be understood that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can also be implemented by dedicated hardware that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0167] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A method for determining the tower clearance value, characterized in that, the method is applied to a wind turbine, the wind turbine includes a tower, a nacelle, blades and a distance measuring device, the nacelle is arranged at the top of the tower, the distance measuring device is arranged on the nacelle and is used to measure the first distance from the tip of the blade to the running track projection plane of the distance measuring device, and the method includes: acquiring the second distance from the distance measuring device to the axis of the tower, the edge parameter of the tower corresponding to the blade tip, the azimuth angle of the distance measuring device, and the first distance, and the cross section of the tower corresponding to the blade tip is a square structure; determining the third distance from the distance measuring device to the edge of the tower according to the second distance, the edge parameter and the azimuth angle of the distance measuring device; determining the tower clearance value of the wind turbine according to the third distance and the first distance.

2. The method for determining the tower clearance value according to claim 1, characterized in that, the method further includes: dividing the cross section of the tower according to the initial position of the nose of the wind turbine to obtain at least one partition; determining the partition where the azimuth angle of the distance measuring device is located based on the partition result.

3. The method for determining the tower clearance value according to claim 1, characterized in that, the determining the third distance from the distance measuring device to the edge of the tower according to the second distance, the edge parameter and the azimuth angle of the distance measuring device includes: determining a first angle according to the partition where the azimuth angle of the distance measuring device is located and the azimuth angle, the first angle is used to determine the third distance from the distance measuring device to the edge of the tower, and the partition is obtained by dividing the cross section of the tower according to the initial position of the nose of the wind turbine; determining the fourth distance from the center of the tower to the edge of the tower on the first connection line between the distance measuring device and the center of the tower according to the first angle and the edge parameter; determining the third distance from the distance measuring device to the edge of the tower on the first connection line according to the fourth distance, the second distance and the first angle.

4. The method for determining the tower clearance value according to claim 3, characterized in that, the determining the first angle according to the partition where the azimuth angle of the distance measuring device is located and the azimuth angle of the distance measuring device includes: responding to the azimuth angle of the distance measuring device being located in the first partition, and determining the azimuth angle as the first angle; responding to the azimuth angle of the distance measuring device being located in the second partition, and determining the difference between the upper limit angle of the second partition and the azimuth angle as the first angle; responding to the azimuth angle of the distance measuring device being located in the third partition, and determining the difference between the azimuth angle and the lower limit angle of the third partition as the first angle; wherein, the first partition, the second partition and the third partition are at least one of the respective partitions.

5. The method for determining the tower clearance value according to claim 2 or 3, characterized in that, The partition includes a first partition, a second partition, and a third partition. The second partition includes four sub - partitions, and the third partition includes three sub - partitions; Each of the sub - partitions of the second partition is centrosymmetric about the center point of the cross - section of the tower. The first sub - partition of the first partition and the first sub - partition of the third partition are centrosymmetric about the center point of the cross - section. The second sub - partition of the third partition and the third sub - partition of the third partition are centrosymmetric about the center point of the cross - section.

6. The method for determining the tower clearance value according to claim 3, characterized in that, The step of determining the third distance from the distance measuring device on the first line to the edge of the tower according to the fourth distance, the second distance, and the first angle includes: Calculating the deviation between the second distance and the fourth distance and the cosine value of the first angle; Based on the deviation and the cosine value, determining the third distance.

7. The method for determining the tower clearance value according to any one of claims 1 - 3, characterized in that, The step of determining the tower clearance value of the wind turbine according to the third distance and the first distance includes: In response to the operating trajectory of the distance measuring device being inside the edge of the tower, determining the sum of the third distance and the first distance as the tower clearance value of the wind turbine; In response to the operating trajectory of the distance measuring device being outside the edge of the tower, determining the difference between the first distance and the third distance as the tower clearance value of the wind turbine.

8. The method for determining the tower clearance value according to any one of claims 1 - 3, characterized in that, After determining the tower clearance value of the wind turbine according to the third distance and the first distance, the method further includes: In response to the tower clearance value being greater than a preset threshold, generating and outputting a warning message for abnormal clearance value.

9. A system for determining the tower clearance value, characterized in that, comprises: A distance measuring device, arranged on the nacelle of the wind turbine, for measuring the first distance from the tip of the blade in the wind turbine to the projection plane of the operating trajectory of the distance measuring device; A nacelle azimuth sensor, arranged inside the nacelle of the wind turbine, for measuring the azimuth angle of the distance measuring device; An acquisition device, for acquiring the first distance, the azimuth angle, the second distance from the distance measuring device to the axis of the tower of the wind turbine, and the edge parameters of the tower corresponding to the blade tip; A control device, for determining the third distance from the distance measuring device to the edge of the tower according to the second distance, the edge parameters, and the azimuth angle of the distance measuring device; And for determining the tower clearance value of the wind turbine according to the third distance and the first distance.

10. A device for determining the tower clearance value, characterized in that, comprises: A processor, A memory, for storing computer program instructions; When the computer program instructions are executed by the processor, the method for determining the tower clearance value according to any one of claims 1 - 8 is implemented.

11. A wind turbine, characterized in that, Including the tower clearance value determination system as described in claim 9 or the tower clearance value determination device as described in claim 10.

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